کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5436589 1509551 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Full length articleFrom telephone cords to branched buckles: A phase diagram
ترجمه فارسی عنوان
مقاله طول کامل از کابل های تلفن به بوککل های شاخه: یک نمودار فاز
کلمات کلیدی
خم شدن لایه لایه شدگی، روش عنصر محدود مدل منطقه محصور، سیم کشی تلفن حالت مخلوط،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

Thin films with low adhesion and large residual stresses may buckle and delaminate from their substrates. This delamination often results in oscillating patterns known as 'telephone cords'. Other configurations can be observed as well, such as entangled networks of blisters. The present study aims at elucidating how these networks are generated through branching. A model coupling a geometrically non-linear plate model and a cohesive zone with mode dependent interfacial toughness is used. Previous work on the early stage delamination of initially circular blisters during interfacial crack front propagation are revisited and extended to the remote post-critical regime to capture front branching. We also build a partial phase diagram of buckling driven delamination morphologies. An intrinsic critical stress parameter is proposed which can be used to predict delamination morphology and to define 'safe' conditions where buckle propagation can be avoided. This critical stress also defines an intrinsic lengthscale which plays the role of a minimum nucleation size.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 125, 15 February 2017, Pages 524-531
نویسندگان
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